Initial commit

9 years ago · f5fc31c6b7
39 changed files with 2706 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,13 @@
+Makefile.in
+aclocal.m4
+autom4te.cache
+config.guess*
+config.sub*
+configure
+depcomp
+install-sh
+ltmain.sh
+m4/
+missing
+*~
+src/core/evcon-config-private.h.in
--- a/22
+++ b/22
@ -0,0 +1,22 @@
+
+The MIT License
+
+Copyright (c) 2012 Stefan Bühler
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/Makefile.am
+++ b/Makefile.am
@ -0,0 +1,12 @@
+
+SUBDIRS = . src
+
+EXTRA_DIST=README.md autogen.sh evcon.pc.in evcon-ev.pc.in evcon-glib.pc.in evcon-event.pc.in
+EXTRA_DIST+=libevcon-ev0.symbols libevcon-event0.symbols libevcon-glib0.symbols libevcon0.symbols
+
+ACLOCAL_AMFLAGS=-I m4
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = evcon.pc evcon-ev.pc evcon-glib.pc evcon-event.pc
+
+$(pkgconfig_DATA): config.status
--- a/README.md
+++ b/README.md
@ -0,0 +1,65 @@
+Description
+-----------
+
+evon is a generic wrapper library that sits between libraries that need socket (file descriptor), timeout and (thread safe) asynchronous events, and an application that wants to use the library.
+
+Platforms
+---------
+
+Should work on all POSIX compatible platforms.
+
+Features
+--------
+
+Event types:
+
+* read and write events for asynchronous file descriptors (sockets)
+* simple timeout events
+* (thread safe) asynchronous events (notifications - for example from other threads, that wakeup the event loop)
+
+Backends for:
+
+* [libev](http://software.schmorp.de/pkg/libev.html)
+* [libevent](http://libevent.org/)
+* [glib](http://developer.gnome.org/glib/unstable/glib-The-Main-Event-Loop.html)
+
+
+Simple Scenario
+---------------
+
+You want to write an application that uses two different event based libraries; if these libraries don't use the same event loop (say X uses libev and Y libevent) you will have difficulties using them - you could give each library its own thread for example, but embedding one event loop in another is usually not easy.
+
+If the libraries were built against evcon, you could use any event loop - if there is no backend for it yet, you probably can write one.
+
+Examples
+--------
+
+See `src/tests/evcon-echo.c` and `src/tests/evcon-echo.h` for an example "library", and `src/tests/evcon-test-*.c` for how to use them in an application.
+
+Building from git
+-----------------
+
+Run the following in the source directory to prepare the build system:
+
+    ./autogen.sh
+
+You will need automake and autoconf for this.
+
+Building
+--------
+
+All backends need glib (>= 2.14).
+The libev backend needs libev >= 4, the libevent backend needs libevent >= 2.
+
+Build in a sub directory:
+
+    mkdir build
+    cd build
+    ../configure
+    make check
+
+Install (probably has to be run as root):
+
+    make install
+
+As always it is recommended to use a package system to install files instead (dpkg, rpm, ...).
--- a/autogen.sh
+++ b/autogen.sh
@ -0,0 +1,31 @@
+#!/bin/sh
+# Run this to generate all the initial makefiles, etc.
+
+LIBTOOLIZE=${LIBTOOLIZE:-libtoolize}
+LIBTOOLIZE_FLAGS="--copy --force"
+ACLOCAL=${ACLOCAL:-aclocal}
+AUTOHEADER=${AUTOHEADER:-autoheader}
+AUTOMAKE=${AUTOMAKE:-automake}
+AUTOMAKE_FLAGS="--add-missing --copy"
+AUTOCONF=${AUTOCONF:-autoconf}
+
+ARGV0=$0
+
+srcdir=$(readlink -f "$0")
+srcdir=$(dirname "$srcdir")
+cd "$srcdir"
+
+set -e
+
+
+run() {
+	echo "$ARGV0: running \`$@'"
+	$@
+}
+
+run $LIBTOOLIZE $LIBTOOLIZE_FLAGS
+run $ACLOCAL $ACLOCAL_FLAGS
+run $AUTOHEADER
+run $AUTOMAKE $AUTOMAKE_FLAGS
+run $AUTOCONF
+echo "Now type './configure ...' and 'make' to compile."
--- a/configure.ac
+++ b/configure.ac
@ -0,0 +1,126 @@
+#                                               -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+AC_PREREQ([2.63])
+AC_INIT([evcon], [0.1.0], [lighttpd@stbuehler.de])
+AC_CONFIG_SRCDIR([src/core/evcon.c])
+AC_CONFIG_HEADERS([src/core/evcon-config-private.h])
+AC_CONFIG_HEADERS([src/core/evcon-config.h])
+
+AC_CONFIG_MACRO_DIR([m4])
+
+AM_INIT_AUTOMAKE([-Wall -Werror foreign])
+
+m4_ifndef([PKG_PROG_PKG_CONFIG], [m4_fatal([pkg-config not installed])])
+m4_ifndef([AC_PROG_LIBTOOL], [m4_fatal([libtool not installed])])
+
+# Checks for programs.
+AC_PROG_CC
+AC_PROG_LIBTOOL
+AC_PROG_MAKE_SET
+
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_TYPE_PID_T
+AC_TYPE_SIZE_T
+
+# Checks for library functions.
+AC_FUNC_FORK
+AC_CHECK_FUNCS([dup2 pipe2])
+
+# Checks for libraries.
+
+AC_ARG_ENABLE([glib], AS_HELP_STRING([--disable-glib], [Disable building glib wrapper]), [build_glib=no], [build_glib=yes])
+AC_ARG_ENABLE([ev], AS_HELP_STRING([--disable-ev], [Disable building ev wrapper]), [build_ev=no], [build_ev=yes])
+AC_ARG_ENABLE([event], AS_HELP_STRING([--disable-event], [Disable building event wrapper]), [build_event=no], [build_event=yes])
+
+if test "x${build_glib}" != "xno" -o "x${build_ev}" != "xno" -o "x${build_event}" != "xno"; then
+	AC_MSG_CHECKING([Enabled at least one backend. Requires glib.])
+
+	# glib
+	PKG_CHECK_MODULES([GLIB], [glib-2.0 >= 2.16.0], [],[AC_MSG_ERROR("glib-2.0 >= 2.16.0 not found")])
+fi
+
+AC_ARG_ENABLE(glib-compat,
+ AC_HELP_STRING([--enable-glib-compat],[build for older glib versions even with new headers]),
+ AC_DEFINE([EVCON_GLIB_COMPAT_API], [1], [build for older glib versions even with new headers]),[])
+
+LIBEV_CFLAGS=""
+LIBEV_LIBS=""
+if test "x${build_ev}" != "xno"; then
+	AC_MSG_CHECKING([Enabled ev wrapper. Requires libev.])
+
+	# libev
+	AC_MSG_CHECKING([for libev support])
+	AC_ARG_WITH([libev],
+		[AS_HELP_STRING([--with-libev@<:@=PATH@:>@],[Search for libev in PATH/include and PATH/lib])],
+		[WITH_LIBEV=$withval],[WITH_LIBEV=yes])
+
+	PKG_CHECK_MODULES([LIBEV], [libev], [], [
+		# no pkg-config for libev, searching manually:
+
+		if test "$WITH_LIBEV" != "yes"; then
+			LIBEV_CFLAGS="-I$WITH_LIBEV/include"
+			LIBEV_LIBS="-L$WITH_LIBEV/lib -lev"
+		else
+			AC_CHECK_HEADERS([ev.h],[
+				AC_CHECK_LIB([ev], [ev_time], [
+						LIBEV_LIBS="-lev"
+					],[
+						AC_MSG_ERROR([libev not found])
+					]
+				)],[
+					AC_MSG_ERROR([libev not found])
+				]
+			)
+		fi
+	])
+fi
+AC_SUBST([LIBEV_CFLAGS])
+AC_SUBST([LIBEV_LIBS])
+
+if test "x${build_event}" != "xno"; then
+	AC_MSG_CHECKING([Enabled event wrapper. Requires libevent.])
+
+	# event
+	PKG_CHECK_MODULES([LIBEVENT], [libevent >= 2], [
+		# we want event_core, not event
+		LIBEVENT_LIBS=`echo "$LIBEVENT_LIBS" | sed 's#\(^\| \)-levent\($\| \)# -levent_core #'`
+	],[AC_MSG_ERROR("libevent >= 2 not found")])
+fi
+
+
+AM_CONDITIONAL([BUILD_GLIB], [test "x${build_glib}" != "xno"])
+AM_CONDITIONAL([BUILD_EV], [test "x${build_ev}" != "xno"])
+AM_CONDITIONAL([BUILD_EVENT], [test "x${build_event}" != "xno"])
+
+
+#AC_ARG_ENABLE([qt], AS_HELP_STRING([--disable-qt], [Disable building qt wrapper]), [build_qt=$withval], [build_qt=yes])
+#
+#if test "x${build_qt}" != "xno"; then
+#	AC_MSG_CHECKING([Enabled qt wrapper. Requires c++ and qt4.])
+#	AC_PROG_CXX
+#	PKG_CHECK_MODULES([QT], [QtCore >= 4.0.0], [],[AC_MSG_ERROR("QtCore >= 4.0.0 not found")])
+#fi
+#AM_CONDITIONAL([BUILD_QT], [test "x${build_qt}" != "xno"])
+
+
+# check for extra compiler options (warning options)
+if test "${GCC}" = "yes"; then
+    CFLAGS="${CFLAGS} -Wall -W -Wshadow -pedantic -std=gnu99"
+fi
+
+AC_ARG_ENABLE(extra-warnings,
+ AC_HELP_STRING([--enable-extra-warnings],[enable extra warnings (gcc specific)]),
+ [case "${enableval}" in
+   yes) extrawarnings=true ;;
+    no) extrawarnings=false ;;
+     *) AC_MSG_ERROR(bad value ${enableval} for --enable-extra-warnings) ;;
+  esac],[extrawarnings=false])
+
+if test x$extrawarnings = xtrue; then
+    CFLAGS="${CFLAGS} -g -O2 -g2 -Wall -Wmissing-declarations -Wdeclaration-after-statement -Wno-pointer-sign -Wcast-align -Winline -Wsign-compare -Wnested-externs -Wpointer-arith -Wl,--as-needed -Wformat-security"
+fi
+
+AC_CONFIG_FILES([Makefile src/Makefile src/core/Makefile src/backend-glib/Makefile src/backend-ev/Makefile src/backend-event/Makefile src/tests/Makefile evcon.pc evcon-ev.pc evcon-glib.pc evcon-event.pc])
+AC_OUTPUT
--- a/evcon-ev.pc.in
+++ b/evcon-ev.pc.in
@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: evcon-ev
+Description: libev backend for event connector library
+Version: @VERSION@
+Requires: evcon
+Libs: -L${libdir} -levcon-ev
+Cflags:
--- a/evcon-event.pc.in
+++ b/evcon-event.pc.in
@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: evcon-event
+Description: libevent backend for event connector library
+Version: @VERSION@
+Requires: evcon
+Libs: -L${libdir} -levcon-event
+Cflags:
--- a/evcon-glib.pc.in
+++ b/evcon-glib.pc.in
@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: evcon-glib
+Description: glib backend for event connector library
+Version: @VERSION@
+Requires: evcon
+Libs: -L${libdir} -levcon-glib
+Cflags:
--- a/evcon.pc.in
+++ b/evcon.pc.in
@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: evcon
+Description: event connector library
+Version: @VERSION@
+Requires:
+Libs: -L${libdir} -levcon
+Cflags:
--- a/libevcon-ev0.symbols
+++ b/libevcon-ev0.symbols
@ -0,0 +1,2 @@
+libevcon-ev.so.0 libevcon-ev0 #MINVER#
+ evcon_loop_from_ev@Base 0.1.0
--- a/libevcon-event0.symbols
+++ b/libevcon-event0.symbols
@ -0,0 +1,2 @@
+libevcon-event.so.0 libevcon-event0 #MINVER#
+ evcon_loop_from_event@Base 0.1.0
--- a/libevcon-glib0.symbols
+++ b/libevcon-glib0.symbols
@ -0,0 +1,4 @@
+libevcon-glib.so.0 libevcon-glib0 #MINVER#
+ evcon_glib_allocator@Base 0.1.0
+ evcon_loop_from_glib@Base 0.1.0
+ evcon_loop_glib_get_context@Base 0.1.0
--- a/libevcon0.symbols
+++ b/libevcon0.symbols
@ -0,0 +1,66 @@
+libevcon.so.0 libevcon0 #MINVER#
+ evcon_alloc0@Base 0.1.0
+ evcon_alloc@Base 0.1.0
+ evcon_allocator_free@Base 0.1.0
+ evcon_allocator_get_data@Base 0.1.0
+ evcon_allocator_init@Base 0.1.0
+ evcon_allocator_new@Base 0.1.0
+ evcon_allocator_set_data@Base 0.1.0
+ evcon_async_free@Base 0.1.0
+ evcon_async_get_backend_data@Base 0.1.0
+ evcon_async_get_cb@Base 0.1.0
+ evcon_async_get_loop@Base 0.1.0
+ evcon_async_get_user_data@Base 0.1.0
+ evcon_async_new@Base 0.1.0
+ evcon_async_set_backend_data@Base 0.1.0
+ evcon_async_set_cb@Base 0.1.0
+ evcon_async_set_user_data@Base 0.1.0
+ evcon_async_wakeup@Base 0.1.0
+ evcon_backend_free@Base 0.1.0
+ evcon_backend_get_data@Base 0.1.0
+ evcon_backend_init@Base 0.1.0
+ evcon_backend_new@Base 0.1.0
+ evcon_backend_set_data@Base 0.1.0
+ evcon_fd_free@Base 0.1.0
+ evcon_fd_get_backend_data@Base 0.1.0
+ evcon_fd_get_cb@Base 0.1.0
+ evcon_fd_get_events@Base 0.1.0
+ evcon_fd_get_fd@Base 0.1.0
+ evcon_fd_get_loop@Base 0.1.0
+ evcon_fd_get_user_data@Base 0.1.0
+ evcon_fd_is_active@Base 0.1.0
+ evcon_fd_new@Base 0.1.0
+ evcon_fd_set_backend_data@Base 0.1.0
+ evcon_fd_set_cb@Base 0.1.0
+ evcon_fd_set_events@Base 0.1.0
+ evcon_fd_set_fd@Base 0.1.0
+ evcon_fd_set_user_data@Base 0.1.0
+ evcon_fd_start@Base 0.1.0
+ evcon_fd_stop@Base 0.1.0
+ evcon_feed_async@Base 0.1.0
+ evcon_feed_fd@Base 0.1.0
+ evcon_feed_timer@Base 0.1.0
+ evcon_free@Base 0.1.0
+ evcon_init_fd@Base 0.1.0
+ evcon_loop_get_allocator@Base 0.1.0
+ evcon_loop_get_backend_data@Base 0.1.0
+ evcon_loop_new@Base 0.1.0
+ evcon_loop_ref@Base 0.1.0
+ evcon_loop_set_backend_data@Base 0.1.0
+ evcon_loop_unref@Base 0.1.0
+ evcon_timer_free@Base 0.1.0
+ evcon_timer_get_backend_data@Base 0.1.0
+ evcon_timer_get_cb@Base 0.1.0
+ evcon_timer_get_loop@Base 0.1.0
+ evcon_timer_get_repeat@Base 0.1.0
+ evcon_timer_get_timeout@Base 0.1.0
+ evcon_timer_get_user_data@Base 0.1.0
+ evcon_timer_is_active@Base 0.1.0
+ evcon_timer_new@Base 0.1.0
+ evcon_timer_once@Base 0.1.0
+ evcon_timer_repeat@Base 0.1.0
+ evcon_timer_set_backend_data@Base 0.1.0
+ evcon_timer_set_cb@Base 0.1.0
+ evcon_timer_set_repeat@Base 0.1.0
+ evcon_timer_set_user_data@Base 0.1.0
+ evcon_timer_stop@Base 0.1.0
--- a/src/Makefile.am
+++ b/src/Makefile.am
@ -0,0 +1 @@
+SUBDIRS = core backend-glib backend-ev backend-event tests
--- a/src/backend-ev/Makefile.am
+++ b/src/backend-ev/Makefile.am
@ -0,0 +1,16 @@
+AM_CFLAGS=-I$(srcdir)/../core
+
+install_libs=
+install_headers=
+
+if BUILD_EV
+install_libs += libevcon-ev.la
+install_headers += evcon-ev.h
+libevcon_ev_la_CPPFLAGS = $(GLIB_CFLAGS) $(LIBEV_CFLAGS)
+libevcon_ev_la_LDFLAGS = -export-dynamic -no-undefined $(GLIB_LIBS) $(LIBEV_LIBS)
+libevcon_ev_la_SOURCES = ev-backend.c
+libevcon_ev_la_LIBADD = ../core/libevcon.la
+endif
+
+lib_LTLIBRARIES = $(install_libs)
+include_HEADERS = $(install_headers)
--- a/src/backend-ev/ev-backend.c
+++ b/src/backend-ev/ev-backend.c
@ -0,0 +1,165 @@
+
+#include <evcon-ev.h>
+
+#include <evcon-allocator.h>
+#include <evcon-backend.h>
+
+#include <evcon-config-private.h>
+
+#include <glib.h>
+
+#define UNUSED(x) ((void)(x))
+
+/* ev loop wrapper */
+
+static void evcon_ev_free_loop(evcon_loop *loop, void *loop_data, void *backend_data) {
+	UNUSED(loop);
+	UNUSED(backend_data);
+	UNUSED(loop_data);
+}
+
+static void evcon_ev_fd_cb(struct ev_loop *loop, ev_io *w, int revents) {
+	evcon_fd_watcher *watcher = (evcon_fd_watcher*) w->data;
+	int events;
+	UNUSED(loop);
+
+	events = 0;
+	if (0 != (revents & EV_ERROR)) events |= EVCON_ERROR;
+	if (0 != (revents & EV_READ)) events |= EVCON_READ;
+	if (0 != (revents & EV_WRITE)) events |= EVCON_WRITE;
+
+	evcon_feed_fd(watcher, events);
+}
+
+static void evcon_ev_fd_update(evcon_fd_watcher *watcher, evcon_fd fd, int events, evcon_allocator *allocator, void *loop_data, void *watcher_data) {
+	ev_io *w = (ev_io*) watcher_data;
+	struct ev_loop *evl = (struct ev_loop*) loop_data;
+	int evs;
+
+	if (-1 == fd) {
+		/* delete watcher */
+		if (NULL == w) return;
+
+		ev_io_stop(evl, w);
+		evcon_free(allocator, w, sizeof(*w));
+		evcon_fd_set_backend_data(watcher, NULL);
+		return;
+	}
+
+	evs = 0;
+	if (0 != (events & EVCON_READ)) evs |= EV_READ;
+	if (0 != (events & EVCON_WRITE)) evs |= EV_WRITE;
+
+	if (NULL == w) {
+		w = evcon_alloc0(allocator, sizeof(ev_io));
+		evcon_fd_set_backend_data(watcher, w);
+		ev_io_init(w, evcon_ev_fd_cb, fd, evs);
+		w->data = watcher;
+		if (0 != evs) ev_io_start(evl, w);
+		return;
+	}
+
+	if (w->events == evs && fd == w->fd) return;
+
+	ev_io_stop(evl, w);
+	ev_io_set(w, fd, evs);
+	if (0 != evs) ev_io_start(evl, w);
+}
+
+static void evcon_ev_timer_cb(struct ev_loop *loop, ev_timer *w, int revents) {
+	evcon_timer_watcher *watcher = (evcon_timer_watcher*) w->data;
+	UNUSED(loop);
+	UNUSED(revents);
+
+	evcon_feed_timer(watcher);
+}
+
+static void evcon_ev_timer_update(evcon_timer_watcher *watcher, evcon_interval timeout, evcon_allocator *allocator, void *loop_data, void *watcher_data) {
+	ev_timer *w = (ev_timer*) watcher_data;
+	struct ev_loop *evl = (struct ev_loop*) loop_data;
+
+	if (-2 == timeout) {
+		/* delete watcher */
+		if (NULL == w) return;
+
+		ev_timer_stop(evl, w);
+		evcon_free(allocator, w, sizeof(*w));
+		evcon_timer_set_backend_data(watcher, NULL);
+		return;
+	}
+
+	if (-1 == timeout && NULL == w) return;
+
+	if (-1 == timeout) {
+		ev_timer_stop(evl, w);
+		return;
+	}
+
+	if (NULL == w) {
+		w = evcon_alloc0(allocator, sizeof(ev_timer));
+		evcon_timer_set_backend_data(watcher, w);
+		ev_timer_init(w, evcon_ev_timer_cb, EVCON_INTERVAL_AS_DOUBLE_SEC(timeout), 0.);
+		w->data = watcher;
+		ev_timer_start(evl, w);
+		return;
+	}
+
+	ev_timer_stop(evl, w);
+	ev_timer_set(w, EVCON_INTERVAL_AS_DOUBLE_SEC(timeout), 0.);
+	ev_timer_start(evl, w);
+}
+
+static void evcon_ev_async_cb(struct ev_loop *loop, ev_async *w, int revents) {
+	evcon_async_watcher *watcher = (evcon_async_watcher*) w->data;
+	UNUSED(loop);
+	UNUSED(revents);
+
+	evcon_feed_async(watcher);
+}
+
+static void evcon_ev_async_update(evcon_async_watcher *watcher, evcon_async_func f, evcon_allocator *allocator, void *loop_data, void *watcher_data) {
+	ev_async *w = (ev_async*) watcher_data;
+	struct ev_loop *evl = (struct ev_loop*) loop_data;
+
+	switch (f) {
+	case EVCON_ASYNC_TRIGGER:
+		ev_async_send(evl, w);
+		break;
+	case EVCON_ASYNC_NEW:
+		w = evcon_alloc0(allocator, sizeof(ev_async));
+		evcon_async_set_backend_data(watcher, w);
+		ev_async_init(w, evcon_ev_async_cb);
+		w->data = watcher;
+		ev_async_start(evl, w);
+		break;
+	case EVCON_ASYNC_FREE:
+		if (NULL == w) return;
+
+		ev_async_stop(evl, w);
+		evcon_free(allocator, w, sizeof(*w));
+		evcon_async_set_backend_data(watcher, NULL);
+		return;
+	}
+}
+
+static evcon_backend* evcon_ev_backend(evcon_allocator* allocator) {
+	static char static_backend_buf[EVCON_BACKEND_RECOMMENDED_SIZE];
+	static volatile evcon_backend* backend = NULL;
+
+	if (g_once_init_enter(&backend)) {
+		evcon_backend* bcknd = evcon_backend_init(static_backend_buf, sizeof(static_backend_buf), NULL, allocator, evcon_ev_free_loop, evcon_ev_fd_update, evcon_ev_timer_update, evcon_ev_async_update);
+
+		g_once_init_leave(&backend, bcknd);
+	}
+
+	return (evcon_backend*) backend;
+}
+
+evcon_loop* evcon_loop_from_ev(struct ev_loop *loop, evcon_allocator* allocator) {
+	evcon_backend *backend = evcon_ev_backend(allocator);
+	evcon_loop *evc_loop = evcon_loop_new(backend, allocator);
+
+	evcon_loop_set_backend_data(evc_loop, loop);
+
+	return evc_loop;
+}
--- a/src/backend-ev/evcon-ev.h
+++ b/src/backend-ev/evcon-ev.h
@ -0,0 +1,10 @@
+#ifndef __EVCON_EVCON_EV_H
+#define __EVCON_EVCON_EV_H __EVCON_EVCON_EV_H
+
+#include <evcon.h>
+
+#include <ev.h>
+
+evcon_loop* evcon_loop_from_ev(struct ev_loop *loop, evcon_allocator* allocator);
+
+#endif
--- a/src/backend-event/Makefile.am
+++ b/src/backend-event/Makefile.am
@ -0,0 +1,16 @@
+AM_CFLAGS=-I$(srcdir)/../core
+
+install_libs=
+install_headers=
+
+if BUILD_EVENT
+install_libs += libevcon-event.la
+install_headers += evcon-event.h
+libevcon_event_la_CPPFLAGS = $(GLIB_CFLAGS) $(LIBEVENT_CFLAGS)
+libevcon_event_la_LDFLAGS = -export-dynamic -no-undefined $(GLIB_LIBS) $(LIBEVENT_LIBS)
+libevcon_event_la_SOURCES = event-backend.c
+libevcon_event_la_LIBADD = ../core/libevcon.la
+endif
+
+lib_LTLIBRARIES = $(install_libs)
+include_HEADERS = $(install_headers)
--- a/src/backend-event/evcon-event.h
+++ b/src/backend-event/evcon-event.h
@ -0,0 +1,10 @@
+#ifndef __EVCON_EVCON_EVENT_H
+#define __EVCON_EVCON_EVENT_H __EVCON_EVCON_EVENT_H
+
+#include <evcon.h>
+
+#include <event2/event.h>
+
+evcon_loop* evcon_loop_from_event(struct event_base *base, evcon_allocator* allocator);
+
+#endif
--- a/src/backend-event/event-backend.c
+++ b/src/backend-event/event-backend.c
@ -0,0 +1,157 @@
+
+#include <evcon-event.h>
+
+#include <evcon-allocator.h>
+#include <evcon-backend.h>
+
+#include <evcon-config-private.h>
+
+#include <glib.h>
+
+#define UNUSED(x) ((void)(x))
+
+/* event loop wrapper */
+
+static void evcon_event_free_loop(evcon_loop *loop, void *loop_data, void *backend_data) {
+	UNUSED(loop);
+	UNUSED(backend_data);
+	UNUSED(loop_data);
+}
+
+static void evcon_event_fd_cb(evutil_socket_t fd, short revents, void *user_data) {
+	evcon_fd_watcher *watcher = (evcon_fd_watcher*) user_data;
+	int events;
+	UNUSED(fd);
+
+	events = 0;
+	if (0 != (revents & EV_READ)) events |= EVCON_READ;
+	if (0 != (revents & EV_WRITE)) events |= EVCON_WRITE;
+
+	evcon_feed_fd(watcher, events);
+}
+
+static void evcon_event_fd_update(evcon_fd_watcher *watcher, evcon_fd fd, int events, evcon_allocator *allocator, void *loop_data, void *watcher_data) {
+	struct event *w = (struct event*) watcher_data;
+	struct event_base *base = (struct event_base*) loop_data;
+	short evs;
+	UNUSED(allocator);
+
+	if (-1 == fd) {
+		/* delete watcher */
+		if (NULL == w) return;
+
+		event_free(w);
+		evcon_fd_set_backend_data(watcher, NULL);
+		return;
+	}
+
+	evs = EV_PERSIST;
+	if (0 != (events & EVCON_READ)) evs |= EV_READ;
+	if (0 != (events & EVCON_WRITE)) evs |= EV_WRITE;
+
+	if (NULL == w) {
+		w = event_new(base, fd, evs, evcon_event_fd_cb, watcher);
+		evcon_fd_set_backend_data(watcher, w);
+		if (EV_PERSIST != evs) event_add(w, NULL);
+		return;
+	}
+
+	if (event_get_events(w) == evs && event_get_fd(w) == fd) return;
+
+	event_del(w);
+	event_assign(w, base, fd, evs, evcon_event_fd_cb, watcher);
+	if (EV_PERSIST != evs) event_add(w, NULL);
+}
+
+static void evcon_event_timer_cb(evutil_socket_t fd, short revents, void *user_data) {
+	evcon_timer_watcher *watcher = (evcon_timer_watcher*) user_data;
+	UNUSED(fd);
+	UNUSED(revents);
+
+	evcon_feed_timer(watcher);
+}
+
+static void evcon_event_timer_update(evcon_timer_watcher *watcher, evcon_interval timeout, evcon_allocator *allocator, void *loop_data, void *watcher_data) {
+	struct event *w = (struct event*) watcher_data;
+	struct event_base *base = (struct event_base*) loop_data;
+	struct timeval tv;
+	UNUSED(allocator);
+
+	if (-2 == timeout) {
+		/* delete watcher */
+		if (NULL == w) return;
+
+		event_free(w);
+		evcon_timer_set_backend_data(watcher, NULL);
+		return;
+	}
+
+	if (-1 == timeout && NULL == w) return;
+
+	if (-1 == timeout) {
+		event_del(w);
+		return;
+	}
+
+	if (NULL == w) {
+		w = event_new(base, -1, EV_TIMEOUT, evcon_event_timer_cb, watcher);
+		evcon_timer_set_backend_data(watcher, w);
+	}
+
+	tv.tv_sec = EVCON_INTERVAL_AS_SEC(timeout);
+	//tv.tv_usec = EVCON_INTERVAL_AS_USEC(timeout) % 1000000;
+	event_add(w, &tv);
+}
+
+static void evcon_event_async_cb(evutil_socket_t fd, short revents, void *user_data) {
+	evcon_async_watcher *watcher = (evcon_async_watcher*) user_data;
+	UNUSED(fd);
+	UNUSED(revents);
+
+	evcon_feed_async(watcher);
+}
+
+static void evcon_event_async_update(evcon_async_watcher *watcher, evcon_async_func f, evcon_allocator *allocator, void *loop_data, void *watcher_data) {
+	struct event *w = (struct event*) watcher_data;
+	struct event_base *base = (struct event_base*) loop_data;
+	UNUSED(allocator);
+
+	switch (f) {
+	case EVCON_ASYNC_TRIGGER:
+		event_active(w, EV_SIGNAL, 0);
+		break;
+	case EVCON_ASYNC_NEW:
+		w = event_new(base, -1, EV_PERSIST, evcon_event_async_cb, watcher);
+		evcon_async_set_backend_data(watcher, w);
+		event_add(w, NULL);
+		break;
+	case EVCON_ASYNC_FREE:
+		if (NULL == w) return;
+
+		event_free(w);
+		evcon_async_set_backend_data(watcher, NULL);
+		return;
+	}
+}
+
+static evcon_backend* evcon_event_backend(evcon_allocator* allocator) {
+	static char static_backend_buf[EVCON_BACKEND_RECOMMENDED_SIZE];
+	static volatile evcon_backend* backend = NULL;
+
+	if (g_once_init_enter(&backend)) {
+		evcon_backend* bcknd = evcon_backend_init(static_backend_buf, sizeof(static_backend_buf), NULL, allocator, evcon_event_free_loop, evcon_event_fd_update, evcon_event_timer_update, evcon_event_async_update);
+
+		g_once_init_leave(&backend, bcknd);
+	}
+
+	return (evcon_backend*) backend;
+}
+
+evcon_loop* evcon_loop_from_event(struct event_base *base, evcon_allocator* allocator) {
+	evcon_backend *backend = evcon_event_backend(allocator);
+	evcon_loop *evc_loop = evcon_loop_new(backend, allocator);
+
+	evcon_loop_set_backend_data(evc_loop, base);
+
+	return evc_loop;
+}
--- a/src/backend-glib/Makefile.am
+++ b/src/backend-glib/Makefile.am
@ -0,0 +1,16 @@
+AM_CFLAGS=-I$(srcdir)/../core
+
+install_libs=
+install_headers=
+
+if BUILD_GLIB
+install_libs += libevcon-glib.la
+install_headers += evcon-glib.h
+libevcon_glib_la_CPPFLAGS = $(GLIB_CFLAGS)
+libevcon_glib_la_LDFLAGS = -export-dynamic -no-undefined $(GLIB_LIBS)
+libevcon_glib_la_SOURCES = glib-allocator.c glib-backend.c
+libevcon_glib_la_LIBADD = ../core/libevcon.la
+endif
+
+lib_LTLIBRARIES = $(install_libs)
+include_HEADERS = $(install_headers)
--- a/src/backend-glib/evcon-glib.h
+++ b/src/backend-glib/evcon-glib.h
@ -0,0 +1,13 @@
+#ifndef __EVCON_EVCON_GLIB_H
+#define __EVCON_EVCON_GLIB_H __EVCON_EVCON_GLIB_H
+
+#include <evcon.h>
+
+#include <glib.h>
+
+evcon_allocator* evcon_glib_allocator(void);
+evcon_loop* evcon_loop_from_glib(GMainContext *ctx, evcon_allocator *allocator);
+
+GMainContext* evcon_loop_glib_get_context(evcon_loop *loop);
+
+#endif
--- a/src/backend-glib/glib-allocator.c
+++ b/src/backend-glib/glib-allocator.c
@ -0,0 +1,38 @@
+
+#include <evcon-glib.h>
+
+#include <evcon-allocator.h>
+
+#include <evcon-config-private.h>
+
+#define UNUSED(x) ((void)(x))
+
+/* GLib slice wrapper */
+
+static void* evcon_glib_alloc_cb(size_t size, void* user_data) {
+	UNUSED(user_data);
+	return g_slice_alloc(size);
+}
+
+static void evcon_glib_free_cb(void *ptr, size_t size, void *user_data) {
+	UNUSED(user_data);
+	g_slice_free1(size, ptr);
+}
+
+evcon_allocator* evcon_glib_allocator(void) {
+	static char static_allocator_buf[EVCON_ALLOCATOR_RECOMMENDED_SIZE];
+	static volatile evcon_allocator* allocator = NULL;
+	static volatile int lock = 0;
+
+	if (2 == g_atomic_int_get(&lock)) return (evcon_allocator*) allocator;
+
+	while (!g_atomic_int_compare_and_exchange(&lock, 0, 1)) {
+		if (2 == g_atomic_int_get(&lock)) return (evcon_allocator*) allocator;
+	}
+
+	allocator = evcon_allocator_init(static_allocator_buf, sizeof(static_allocator_buf), NULL, evcon_glib_alloc_cb, evcon_glib_free_cb);
+
+	g_atomic_int_set(&lock, 2);
+
+	return (evcon_allocator*) allocator;
+}
--- a/src/backend-glib/glib-backend.c
+++ b/src/backend-glib/glib-backend.c
@ -0,0 +1,376 @@
+
+#define _GNU_SOURCE
+
+#include <evcon-glib.h>
+
+#include <evcon-allocator.h>
+#include <evcon-backend.h>
+
+#include <evcon-config-private.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#define UNUSED(x) ((void)(x))
+
+#ifndef EVCON_GLIB_COMPAT_API
+# if GLIB_MAJOR_VERSION == 2 && GLIB_MINOR_VERSION < 31
+#  define EVCON_GLIB_COMPAT_API 1
+# endif
+#endif
+
+#ifdef EVCON_GLIB_COMPAT_API
+
+typedef GMutex* evcon_glib_mutex;
+
+static void evcon_glib_mutex_init(evcon_glib_mutex *m) {
+	*m = (*g_thread_functions_for_glib_use.mutex_new)();
+}
+
+static void evcon_glib_mutex_clear(evcon_glib_mutex *m) {
+	GMutex *mx = *m;
+	if (g_thread_supported()) (*g_thread_functions_for_glib_use.mutex_free)(mx);
+	*m = NULL;
+}
+
+static void evcon_glib_mutex_lock(evcon_glib_mutex *m) {
+	GMutex *mx = *m;
+	if (g_thread_supported()) (*g_thread_functions_for_glib_use.mutex_lock)(mx);
+}
+
+static void evcon_glib_mutex_unlock(evcon_glib_mutex *m) {
+	GMutex *mx = *m;
+	if (g_thread_supported()) (*g_thread_functions_for_glib_use.mutex_unlock)(mx);
+}
+
+#else
+
+typedef GMutex evcon_glib_mutex;
+
+static void evcon_glib_mutex_init(evcon_glib_mutex *m) {
+	g_mutex_init(m);
+}
+
+static void evcon_glib_mutex_clear(evcon_glib_mutex *m) {
+	g_mutex_clear(m);
+}
+
+static void evcon_glib_mutex_lock(evcon_glib_mutex *m) {
+	g_mutex_lock(m);
+}
+
+static void evcon_glib_mutex_unlock(evcon_glib_mutex *m) {
+	g_mutex_unlock(m);
+}
+
+#endif
+
+/* GLib loop wrapper */
+
+typedef struct evcon_glib_data evcon_glib_data;
+typedef struct evcon_glib_fd_source evcon_glib_fd_source;
+typedef struct evcon_glib_async_watcher evcon_glib_async_watcher;
+
+struct evcon_glib_data {
+	GMainContext *ctx;
+
+	gint async_pipe_fds[2];
+	evcon_fd_watcher *async_watcher;
+	evcon_glib_mutex async_mutex;
+	GQueue async_pending;
+};
+
+struct evcon_glib_fd_source {
+	GSource source;
+	GPollFD pollfd;
+	evcon_fd_watcher *watcher;
+};
+
+struct evcon_glib_async_watcher {
+	GList pending_link;
+	evcon_async_watcher *orig;
+	gboolean active;
+};
+
+static void evcon_glib_free_loop(evcon_loop *loop, void *loop_data, void *backend_data) {
+	evcon_glib_data *data = (evcon_glib_data*) loop_data;
+	UNUSED(loop);
+	UNUSED(backend_data);
+
+	evcon_loop_ref(loop);
+	evcon_fd_free(data->async_watcher);
+
+	close(data->async_pipe_fds[0]); data->async_pipe_fds[0] = -1;
+	close(data->async_pipe_fds[1]); data->async_pipe_fds[1] = -1;
+
+	g_main_context_ref(data->ctx);
+	evcon_glib_mutex_clear(&data->async_mutex);
+	g_slice_free(evcon_glib_data, data);
+}
+
+/* own FD poll handling */
+
+static gboolean fd_source_prepare(GSource *source, gint *timeout);
+static gboolean fd_source_check(GSource *source);
+static gboolean fd_source_dispatch(GSource *source, GSourceFunc callback, gpointer user_data);
+static void fd_source_finalize(GSource *source);
+
+static GSourceFuncs fd_source_funcs = {
+	fd_source_prepare,
+	fd_source_check,
+	fd_source_dispatch,
+	fd_source_finalize, 0, 0
+};
+
+static gboolean fd_source_prepare(GSource *source, gint *timeout) {
+	UNUSED(source);
+	*timeout = -1;
+	return FALSE;
+}
+static gboolean fd_source_check(GSource *source) {
+	evcon_glib_fd_source *watch = (evcon_glib_fd_source*) source;
+	return 0 != (watch->pollfd.revents & watch->pollfd.events);
+}
+static gboolean fd_source_dispatch(GSource *source, GSourceFunc callback, gpointer user_data) {
+	evcon_glib_fd_source *watch = (evcon_glib_fd_source*) source;
+	int events;
+	UNUSED(callback);
+	UNUSED(user_data);
+
+	events = 0;
+	watch->pollfd.revents &= watch->pollfd.events;
+	if (0 != (watch->pollfd.revents & (G_IO_IN | G_IO_HUP))) events |= EVCON_READ;
+	if (0 != (watch->pollfd.revents & G_IO_ERR)) events |= EVCON_ERROR;
+	if (0 != (watch->pollfd.revents & G_IO_OUT)) events |= EVCON_WRITE;
+
+	if (0 != events) evcon_feed_fd(watch->watcher, events);
+
+	return TRUE;
+}
+static void fd_source_finalize(GSource *source) {
+	UNUSED(source);
+}
+
+static GSource* fd_source_new(evcon_fd_watcher *watcher) {
+	GSource *source = g_source_new(&fd_source_funcs, sizeof(evcon_glib_fd_source));
+	evcon_glib_fd_source *watch = (evcon_glib_fd_source*) source;
+	watch->watcher = watcher;
+	watch->pollfd.fd = -1;
+	watch->pollfd.events = watch->pollfd.revents = 0;
+	evcon_fd_set_backend_data(watcher, watch);
+	return source;
+}
+
+static void evcon_glib_fd_update(evcon_fd_watcher *watcher, evcon_fd fd, int events, evcon_allocator *allocator, void *loop_data, void *watcher_data) {
+	GMainContext *ctx = ((evcon_glib_data*) loop_data)->ctx;
+	GSource *source = (GSource*) watcher_data;
+	evcon_glib_fd_source *watch;
+	int evs;
+	UNUSED(allocator);
+
+	if (-1 == fd) {
+		/* delete watcher */
+		if (NULL == source) return;
+		g_source_destroy(source);
+		g_source_unref(source);
+		return;
+	}
+
+	if (NULL == source) {
+		source = fd_source_new(watcher);
+		g_source_attach(source, ctx);
+		watch = (evcon_glib_fd_source*) source;
+		g_source_add_poll(source, &watch->pollfd);
+	} else {
+		watch = (evcon_glib_fd_source*) source;
+	}
+
+	evs = 0;
+	if (0 != (events & EVCON_READ)) evs |= G_IO_IN | G_IO_HUP | G_IO_ERR;
+	if (0 != (events & EVCON_WRITE)) evs |= G_IO_OUT | G_IO_ERR;
+
+	if (fd == watch->pollfd.fd && evs == watch->pollfd.events) return;
+
+	if (fd != watch->pollfd.fd) watch->pollfd.revents = 0;
+
+	watch->pollfd.fd = fd;
+	watch->pollfd.events = evs;
+}
+
+static gboolean evcon_glib_timer_cb(gpointer data) {
+	evcon_timer_watcher *watcher = (evcon_timer_watcher*) data;
+	evcon_feed_timer(watcher);
+	return FALSE;
+}
+
+static void evcon_glib_timer_update(evcon_timer_watcher *watcher, evcon_interval timeout, evcon_allocator *allocator, void *loop_data, void *watcher_data) {
+	GMainContext *ctx = ((evcon_glib_data*) loop_data)->ctx;
+	GSource *source = (GSource*) watcher_data;
+	UNUSED(allocator);
+
+	if (NULL != source) {
+		/* delete old source */
+		g_source_destroy(source);
+		g_source_unref(source);
+	}
+
+	if (timeout < 0) return;
+
+	if (timeout == 0) {
+		source = g_idle_source_new();
+	} else {
+		source = g_timeout_source_new(EVCON_INTERVAL_AS_MSEC(timeout));
+	}
+	evcon_timer_set_backend_data(watcher, source);
+	g_source_set_callback(source, evcon_glib_timer_cb, watcher, NULL);
+	g_source_attach(source, ctx);
+}
+
+
+static void evcon_glib_async_update(evcon_async_watcher *watcher, evcon_async_func f, evcon_allocator *allocator, void *loop_data, void *watcher_data) {
+	static const char val = 'A';
+	evcon_glib_data *data = (evcon_glib_data*) loop_data;
+	evcon_glib_async_watcher *w = (evcon_glib_async_watcher*) watcher_data;
+	UNUSED(allocator);
+
+	evcon_glib_mutex_lock(&data->async_mutex);
+
+	switch (f) {
+	case EVCON_ASYNC_TRIGGER:
+		if (!w->active) {
+			w->active = TRUE;
+			if (0 == data->async_pending.length) {
+				int r;
+trigger_again:
+				r = write(data->async_pipe_fds[1], &val, sizeof(val));
+				if (-1 == r) {
+					switch (errno) {
+					case EINTR:
+						goto trigger_again;
+					case EAGAIN:
+#if EWOULDBLOCK != EAGAIN
+					case EWOULDBLOCK:
+#endif
+						break; /* enough data in the pipe to trigger */
+					default:
+						g_error("async wake write failed: %s", g_strerror(errno));
+					}
+				}
+			}
+			g_queue_push_tail_link(&data->async_pending, &w->pending_link);
+		}
+		break;
+	case EVCON_ASYNC_NEW:
+		w = g_slice_new0(evcon_glib_async_watcher);
+		w->pending_link.data = w;
+		w->orig = watcher;
+		evcon_async_set_backend_data(watcher, w);
+		break;
+	case EVCON_ASYNC_FREE:
+		if (NULL == w) goto exit;
+
+		if (w->active) {
+			g_queue_unlink(&data->async_pending, &w->pending_link);
+			w->active = FALSE;
+		}
+		g_slice_free(evcon_glib_async_watcher, w);
+		evcon_async_set_backend_data(watcher, NULL);
+		goto exit;
+	}
+
+exit:
+	evcon_glib_mutex_unlock(&data->async_mutex);
+}
+
+static void evcon_glib_async_cb(evcon_loop *loop, evcon_fd_watcher *watcher, evcon_fd fd, int revents, void* user_data) {
+	evcon_glib_data *data = user_data;
+	evcon_glib_async_watcher *w;
+	char buf[32];
+	UNUSED(loop);
+	UNUSED(watcher);
+	UNUSED(revents);
+
+	(void) read(fd, buf, sizeof(buf));
+
+	for (;;) {
+		{
+			GList *link;
+			evcon_glib_mutex_lock(&data->async_mutex);
+			link = g_queue_pop_head_link(&data->async_pending);
+			if (NULL != link) {
+				w = (evcon_glib_async_watcher*) link->data;
+				w->active = FALSE;
+			} else {
+				w = NULL;
+			}
+			evcon_glib_mutex_unlock(&data->async_mutex);
+		}
+
+		if (NULL == w) break;
+
+		evcon_feed_async(w->orig);
+	}
+}
+
+static evcon_backend* evcon_glib_backend(void) {
+	static char static_backend_buf[EVCON_BACKEND_RECOMMENDED_SIZE];
+	static volatile evcon_backend* backend = NULL;
+
+	if (g_once_init_enter(&backend)) {
+		evcon_backend* bcknd = evcon_backend_init(static_backend_buf, sizeof(static_backend_buf), NULL, evcon_glib_allocator(), evcon_glib_free_loop, evcon_glib_fd_update, evcon_glib_timer_update, evcon_glib_async_update);
+
+		g_once_init_leave(&backend, bcknd);
+	}
+
+	return (evcon_backend*) backend;
+}
+
+static gboolean setup_pipe(int fds[2]) {
+#ifdef HAVE_PIPE2
+	if (-1 == pipe2(fds, O_NONBLOCK | O_CLOEXEC)) {
+		g_error("Cannot create pipe: %s\n", g_strerror(errno));
+		return FALSE;
+	}
+#else
+	if (-1 == pipe(fds)) {
+		g_error("Cannot create pipe: %s\n", g_strerror(errno));
+		return FALSE;
+	}
+
+	evcon_init_fd(fds[0]);
+	evcon_init_fd(fds[1]);
+#endif
+	return TRUE;
+}
+
+evcon_loop* evcon_loop_from_glib(GMainContext *ctx, evcon_allocator *allocator) {
+	evcon_backend *backend;
+	evcon_glib_data *loop_data;
+	evcon_loop *evc_loop;
+	int async_pipe_fds[2];
+
+	if (!setup_pipe(async_pipe_fds)) return NULL;
+
+	if (NULL == allocator) allocator = evcon_glib_allocator();
+
+	backend = evcon_glib_backend();
+	loop_data = g_slice_new0(evcon_glib_data);
+	evc_loop = evcon_loop_new(backend, allocator);
+
+	g_main_context_ref(ctx);
+	loop_data->ctx = ctx;
+	loop_data->async_pipe_fds[0] = async_pipe_fds[0];
+	loop_data->async_pipe_fds[1] = async_pipe_fds[1];
+	evcon_glib_mutex_init(&loop_data->async_mutex);
+	evcon_loop_set_backend_data(evc_loop, loop_data);
+
+	loop_data->async_watcher = evcon_fd_new(evc_loop, evcon_glib_async_cb, async_pipe_fds[0], EVCON_READ, loop_data);
+	evcon_loop_unref(evc_loop);
+
+	return evc_loop;
+}
+
+GMainContext* evcon_loop_glib_get_context(evcon_loop *loop) {
+	return ((evcon_glib_data*) evcon_loop_get_backend_data(loop))->ctx;
+}
--- a/src/backend-qt/Makefile.am
+++ b/src/backend-qt/Makefile.am
@ -0,0 +1,16 @@
+AM_CFLAGS=-I$(srcdir)/../core
+
+install_libs=
+install_headers=
+
+if BUILD_QT
+install_libs += libevcon-qt.la
+install_headers += evcon-qt.h
+libevcon_qt_la_CPPFLAGS = $(QT_CFLAGS)
+libevcon_qt_la_LDFLAGS = -export-dynamic -no-undefined $(QT_LIBS)
+libevcon_qt_la_SOURCES = evcon-qt.cpp
+libevcon_qt_la_LIBADD = ../core/libevcon.la
+endif
+
+lib_LTLIBRARIES = $(install_libs)
+include_HEADERS = $(install_headers)
--- a/src/core/Makefile.am
+++ b/src/core/Makefile.am
@ -0,0 +1,14 @@
+
+install_libs=
+install_headers=
+
+install_libs += libevcon.la
+install_headers += evcon.h evcon-config.h evcon-allocator.h evcon-backend.h
+libevcon_la_LDFLAGS = -export-dynamic -no-undefined
+libevcon_la_SOURCES = evcon.c
+
+lib_LTLIBRARIES = $(install_libs)
+include_HEADERS = $(install_headers)
+
+dist-hook:
+	rm -f $(distdir)/evcon-config.h
--- a/src/core/evcon-allocator.h
+++ b/src/core/evcon-allocator.h
@ -0,0 +1,35 @@
+#ifndef __EVCON_EVCON_ALLOCATOR_H
+#define __EVCON_EVCON_ALLOCATOR_H __EVCON_EVCON_ALLOCATOR_H
+
+#include <evcon.h>
+
+/* Slab allocator */
+
+/*
+ * public interface
+ */
+
+void* evcon_alloc(evcon_allocator* allocator, size_t size);
+void* evcon_alloc0(evcon_allocator* allocator, size_t size);
+void evcon_free(evcon_allocator* allocator, void* ptr, size_t size);
+
+/*
+ * implementation interface
+ */
+
+typedef void* (*evcon_alloc_cb)(size_t size, void* user_data);
+typedef void (*evcon_free_cb)(void *ptr, size_t size, void *user_data);
+
+evcon_allocator* evcon_allocator_new(void* user_data, evcon_alloc_cb alloc_cb, evcon_free_cb free_cb);
+void evcon_allocator_free(evcon_allocator* allocator); /* freeing the allocator should be the last thing your app does */
+
+#define EVCON_ALLOCATOR_RECOMMENDED_SIZE (4*sizeof(void*))
+/* if memsize is large enough to contain a backend, initialize it and returns mem. otherwise allocates a new block */
+evcon_allocator* evcon_allocator_init(char *mem, size_t memsize,
+                                      void *user_data, evcon_alloc_cb alloc_cb, evcon_free_cb free_cb);
+
+/* allows to change user_data */
+void* evcon_allocator_get_data(evcon_allocator *allocator);
+void evcon_allocator_set_data(evcon_allocator *allocator, void *user_data);
+
+#endif
--- a/src/core/evcon-backend.h
+++ b/src/core/evcon-backend.h
@ -0,0 +1,64 @@
+#ifndef __EVCON_EVCON_BACKEND_H
+#define __EVCON_EVCON_BACKEND_H __EVCON_EVCON_BACKEND_H
+
+#include <evcon.h>
+
+typedef void (*evcon_backend_free_loop_cb)(evcon_loop *loop, void *loop_data, void *backend_data);
+
+/* fd == -1: delete watcher */
+typedef void (*evcon_backend_fd_update_cb)(evcon_fd_watcher *watcher, evcon_fd fd, int events, evcon_allocator *allocator, void *loop_data, void *watcher_data);
+
+/* special timeout values:
+ *   0: idle watcher (for background jobs)
+ *  -1: disable temporarily
+ *  -2: delete watcher
+ * gets called after *each* timer event to set a new timeout value
+ */
+typedef void (*evcon_backend_timer_update_cb)(evcon_timer_watcher *watcher, evcon_interval timeout, evcon_allocator *allocator, void *loop_data, void *watcher_data);
+
+typedef enum {
+	EVCON_ASYNC_TRIGGER = 0, /* <- trigger be thread safe */
+	EVCON_ASYNC_NEW     = 1,
+	EVCON_ASYNC_FREE    = 2
+} evcon_async_func;
+
+typedef void (*evcon_backend_async_update_cb)(evcon_async_watcher *watcher, evcon_async_func f, evcon_allocator *allocator, void *loop_data, void *watcher_data);
+
+evcon_backend* evcon_backend_new(void *backend_data,
+                                 evcon_allocator *allocator,
+                                 evcon_backend_free_loop_cb free_loop_cb,
+                                 evcon_backend_fd_update_cb fd_update_cb,
+                                 evcon_backend_timer_update_cb timer_update_cb,
+                                 evcon_backend_async_update_cb async_udpate_cb);
+void evcon_backend_free(evcon_backend *backend);
+
+#define EVCON_BACKEND_RECOMMENDED_SIZE (8*sizeof(void*))
+/* if memsize is large enough to contain a backend, initialize it and returns @mem. otherwise alloc a new block */
+evcon_backend* evcon_backend_init(char *mem, size_t memsize,
+                                  void *backend_data,
+                                  evcon_allocator *allocator,
+                                  evcon_backend_free_loop_cb free_loop_cb,
+                                  evcon_backend_fd_update_cb fd_update_cb,
+                                  evcon_backend_timer_update_cb timer_update_cb,
+                                  evcon_backend_async_update_cb async_udpate_cb);
+
+evcon_loop* evcon_loop_new(evcon_backend *backend, evcon_allocator *allocator);
+
+void* evcon_backend_get_data(evcon_backend *backend);
+void* evcon_loop_get_backend_data(evcon_loop *loop);
+void* evcon_fd_get_backend_data(evcon_fd_watcher *watcher);
+void* evcon_timer_get_backend_data(evcon_timer_watcher *watcher);
+void* evcon_async_get_backend_data(evcon_async_watcher *watcher);
+
+void evcon_backend_set_data(evcon_backend *backend, void *data);
+void evcon_loop_set_backend_data(evcon_loop *loop, void *data);
+void evcon_fd_set_backend_data(evcon_fd_watcher *watcher, void *data);
+void evcon_timer_set_backend_data(evcon_timer_watcher *watcher, void *data);
+void evcon_async_set_backend_data(evcon_async_watcher *watcher, void *data);
+
+
+void evcon_feed_fd(evcon_fd_watcher *watcher, int events);
+void evcon_feed_timer(evcon_timer_watcher *watcher);
+void evcon_feed_async(evcon_async_watcher *watcher);
+
+#endif
--- a/src/core/evcon-config-private.h.in
+++ b/src/core/evcon-config-private.h.in
@ -0,0 +1,98 @@
+/* src/core/evcon-config-private.h.in.  Generated from configure.ac by autoheader.  */
+
+/* build for older glib versions even with new headers */
+#undef EVCON_GLIB_COMPAT_API
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#undef HAVE_DLFCN_H
+
+/* Define to 1 if you have the `dup2' function. */
+#undef HAVE_DUP2
+
+/* Define to 1 if you have the <ev.h> header file. */
+#undef HAVE_EV_H
+
+/* Define to 1 if you have the `fork' function. */
+#undef HAVE_FORK
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define to 1 if you have the <memory.h> header file. */
+#undef HAVE_MEMORY_H
+
+/* Define to 1 if you have the `pipe2' function. */
+#undef HAVE_PIPE2
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define to 1 if you have the `vfork' function. */
+#undef HAVE_VFORK
+
+/* Define to 1 if you have the <vfork.h> header file. */
+#undef HAVE_VFORK_H
+
+/* Define to 1 if `fork' works. */
+#undef HAVE_WORKING_FORK
+
+/* Define to 1 if `vfork' works. */
+#undef HAVE_WORKING_VFORK
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#undef LT_OBJDIR
+
+/* Name of package */
+#undef PACKAGE
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* Define to 1 if you have the ANSI C header files. */
+#undef STDC_HEADERS
+
+/* Version number of package */
+#undef VERSION
+
+/* Define to `int' if <sys/types.h> does not define. */
+#undef pid_t
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef size_t
+
+/* Define as `fork' if `vfork' does not work. */
+#undef vfork
--- a/src/core/evcon-config.h.in
+++ b/src/core/evcon-config.h.in
@ -0,0 +1,9 @@
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
--- a/src/core/evcon.c
+++ b/src/core/evcon.c
@ -0,0 +1,564 @@
+
+#include <evcon.h>
+#include <evcon-backend.h>
+#include <evcon-allocator.h>
+
+#include <evcon-config-private.h>
+
+#include <assert.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+
+#define EVCON_STR_LEN(s) (s), (sizeof(s)-1)
+
+struct evcon_allocator {
+	void* user_data;
+	evcon_alloc_cb alloc_cb;
+	evcon_free_cb free_cb;
+};
+
+struct evcon_backend {
+	void *backend_data;
+	evcon_allocator *allocator;
+	evcon_backend_free_loop_cb free_loop_cb;
+	evcon_backend_fd_update_cb fd_update_cb;
+	evcon_backend_timer_update_cb timer_update_cb;
+	evcon_backend_async_update_cb async_update_cb;
+};
+
+struct evcon_loop {
+	unsigned int refcount;
+	void *backend_data;
+	evcon_backend *backend;
+	evcon_allocator *allocator;
+};
+
+struct evcon_fd_watcher {
+	void *user_data;
+	void *backend_data;
+	unsigned int active:1, incallback:1, delayed_delete:1;
+	evcon_loop *loop;
+	evcon_fd_cb cb;
+	evcon_fd fd;
+	int events;
+};
+
+struct evcon_timer_watcher {
+	void *user_data;
+	void *backend_data;
+	unsigned int active:1, incallback:1, delayed_delete:1;
+	evcon_loop *loop;
+	evcon_timer_cb cb;
+	evcon_interval timeout, repeat;
+};
+
+struct evcon_async_watcher {
+	void *user_data;
+	void *backend_data;
+	unsigned int incallback:1, delayed_delete:1;
+	evcon_loop *loop;
+	evcon_async_cb cb;
+};
+
+/*****************************************************
+ *             Allocator                             *
+ *****************************************************/
+
+void* evcon_alloc(evcon_allocator* allocator, size_t size) {
+	void *ptr;
+	if (NULL == allocator) {
+		ptr = malloc(size);
+	} else {
+		ptr = allocator->alloc_cb(size, allocator->user_data);
+	}
+	if (NULL == ptr) {
+		write(2, EVCON_STR_LEN("evcon_alloc: failed to allocate"));
+		abort();
+	}
+	return ptr;
+}
+
+void* evcon_alloc0(evcon_allocator* allocator, size_t size) {
+	void *ptr = evcon_alloc(allocator, size);
+	memset(ptr, 0, size);
+	return ptr;
+}
+
+void evcon_free(evcon_allocator* allocator, void* ptr, size_t size) {
+	if (NULL == ptr) return;
+	if (NULL == allocator) {
+		free(ptr);
+	} else {
+		allocator->free_cb(ptr, size, allocator->user_data);
+	}
+}
+
+evcon_allocator* evcon_allocator_new(void* user_data, evcon_alloc_cb alloc_cb, evcon_free_cb free_cb) {
+	evcon_allocator* allocator;
+
+	assert(NULL != alloc_cb);
+	assert(NULL != free_cb);
+
+	allocator = alloc_cb(sizeof(evcon_allocator), user_data);
+	allocator->user_data = user_data;
+	allocator->alloc_cb = alloc_cb;
+	allocator->free_cb = free_cb;
+
+	return allocator;
+}
+
+void evcon_allocator_free(evcon_allocator* allocator) {
+	evcon_free_cb free_cb;
+	void* user_data;
+
+	if (NULL == allocator) return;
+
+	free_cb = allocator->free_cb;
+	user_data = allocator->user_data;
+
+	memset(allocator, 0, sizeof(evcon_allocator));
+
+	free_cb(allocator, sizeof(evcon_allocator), user_data);
+}
+
+evcon_allocator* evcon_allocator_init(char *mem, size_t memsize,
+                                      void *user_data, evcon_alloc_cb alloc_cb, evcon_free_cb free_cb) {
+	evcon_allocator *allocator = (evcon_allocator*) mem;
+	if (sizeof(evcon_allocator) > memsize) {
+		return evcon_allocator_new(user_data, alloc_cb, free_cb);
+	} else {
+		allocator->user_data = user_data;
+		allocator->alloc_cb = alloc_cb;
+		allocator->free_cb = free_cb;
+		return allocator;
+	}
+}
+
+void* evcon_allocator_get_data(evcon_allocator *allocator) {
+	return allocator->user_data;
+}
+
+void evcon_allocator_set_data(evcon_allocator *allocator, void *user_data) {
+	allocator->user_data = user_data;
+}
+
+/*****************************************************
+ *             Backend                               *
+ *****************************************************/
+
+evcon_backend* evcon_backend_new(void *backend_data,
+                                 evcon_allocator *allocator,
+                                 evcon_backend_free_loop_cb free_loop_cb,
+                                 evcon_backend_fd_update_cb fd_update_cb,
+                                 evcon_backend_timer_update_cb timer_update_cb,
+                                 evcon_backend_async_update_cb async_update_cb) {
+	evcon_backend *backend = evcon_alloc0(allocator, sizeof(evcon_backend));